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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 226 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.23² =
  2. 2.17² =
  3. 3.25² =
  4. 4.16² =
  5. 5.26² =
  6. 6.19² =
  7. 7.22² =
  8. 8.18² =
  9. 9.15² =
  10. 10.27² =
  11. 11.11² =
  12. 12.29² =
  13. 13.13² =
  14. 14.24² =
  15. 15.28² =
  16. 16.26² =
  17. 17.21² =
  18. 18.14² =
  19. 19.12² =
  20. 20.15² =
  21. 21.22² =
  22. 22.24² =
  23. 23.26² =
  24. 24.21² =
  25. 25.26² =
  26. 26.12² =
  27. 27.18² =
  28. 28.21² =
  29. 29.13² =
  30. 30.18² =
  31. 31.21² =
  32. 32.21² =
  33. 33.27² =
  34. 34.25² =
  35. 35.15² =
  36. 36.14² =
  37. 37.27² =
  38. 38.25² =
  39. 39.21² =
  40. 40.29² =

Answer key

  1. 529
  2. 289
  3. 625
  4. 256
  5. 676
  6. 361
  7. 484
  8. 324
  9. 225
  10. 729
  11. 121
  12. 841
  13. 169
  14. 576
  15. 784
  16. 676
  17. 441
  18. 196
  19. 144
  20. 225
  21. 484
  22. 576
  23. 676
  24. 441
  25. 676
  26. 144
  27. 324
  28. 441
  29. 169
  30. 324
  31. 441
  32. 441
  33. 729
  34. 625
  35. 225
  36. 196
  37. 729
  38. 625
  39. 441
  40. 841

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